JusPrin 2: the AI slicer that helps you get better prints
You shouldn't have to be a material scientist to 3D print. In JusPrin 2, you tell AI how you want a part printed, and AI works out the slicer settings, so you don't need to know what volumetric flow rate is. When a print comes out wrong, you show AI a photo. AI finds the problem, changes the settings and slices again.
JusPrin 2 is a free, open-source slicer built on OrcaSlicer 2.5.0, for Windows, Mac and Linux. Put in your own AI key and it is completely free: you pay only your AI provider for what you use. Or use JusPrin's own AI, which specializes in 3D printing and starts you with 500 free credits. If you already work in an AI tool such as Claude Code or Codex, that tool can drive JusPrin too.
Download JusPrin 2 and give it a try.
JusPrin 2 is a new app, not an update of JusPrin 1. JusPrin 1 answered questions and picked settings in a chat window. In JusPrin 2, AI works in the project you have open: it can read what the slicer knows and do what the slicer can do.
What AI does in a project
Each project has an AI chat beside the 3D view. You ask in plain words, and AI does the work in the open project:
- Sets up a print. It picks the printer, filament and print settings for the part you are printing.
- Changes settings for you. Ask for a stronger part or a faster print. AI finds the settings and changes them.
- Slices and checks the result. It slices the plate and looks for problems, such as support printed inside a hole, or a part that starts in the air.
- Explains a slice problem. When a slice has a problem, a marker on the 3D view shows where. Press Ask AI, and AI explains the problem and your options.
- Helps with a failed print. Show it a photo of what went wrong, and it suggests what to change.
- Calibrates a filament from a photo. It sets up a temperature, flow or pressure advance test. You print the test and take a photo. AI reads the photo and saves the result as a new filament preset.
- Works on the plate. It opens model and project files, places objects, lays out plates, and cuts, splits, merges and repairs objects.
AI never starts a print. When you ask it to print, it opens the usual send dialog. You choose the options and press Send.
Connect a printer by chatting
You add a printer by telling AI about it. AI walks you through connecting it and checks that the connection works. Bambu Lab, Klipper (Moonraker) and OctoPrint printers can be connected.
Your projects and printers are on one Home screen. Each printer card shows the printer's status and opens the printer's own window.
Still a full slicer
Everything OrcaSlicer 2.5.0 does is still there. View › Switch to classic view shows OrcaSlicer's full interface, and Back to JusPrin returns.
You don't need AI, or an account, to slice and print.
If you use OrcaSlicer or JusPrin 1 today, JusPrin 2 offers to import your printers the first time it starts, with their filaments and print settings.
Three ways to use AI
1. A JusPrin account. Sign up in the app with your email or with Google. A new account gets 500 free credits for its first month, and no card is needed. JusPrin's AI specializes in 3D printing, and this is the quickest way to start.
2. Your own API key. Use a key from Anthropic, OpenAI or OpenRouter. You pay that provider for what you use. JusPrin charges nothing and uses no credits.
3. An AI app you already use. Connect Claude Code, Codex, Claude Desktop, Cowork, Cursor or VS Code to JusPrin. The AI in that app can then work in the project you have open in JusPrin: read the settings, change them and slice. JusPrin does this over MCP, the standard way AI apps connect to other programs. This is free too.
You can change between these at any time in Preferences.
What a JusPrin account costs
A JusPrin account pays for AI with credits. A Standard message costs 1 credit, and an Expert message costs 5. Standard is the faster model, for everyday questions and changes. Expert is the stronger model, for harder problems. Only the messages you send cost credits. The work AI does to answer one message, such as reading settings and slicing, costs nothing more.
Free. A new account gets 500 credits for its first month. After the first month, an account without a plan gets 50 free credits a month.
To get more credits, buy a credit pack or subscribe to a plan:
| Price | Credits | |
|---|---|---|
| Credit pack | $10, paid once | 500 credits that never expire |
| Hobby | $10 a month, or $100 a year | 750 credits a month |
| Workshop | $20 a month, or $200 a year | 1,000 credits a month, and Standard messages cost 0 credits |
A plan's credits reset each month, and unused ones don't carry over. Paying yearly costs the same as 10 months of paying monthly. You can cancel a plan at any time, and you keep it until the end of the time you paid for.
Double credits until 31 January 2027
To celebrate the launch, everything comes with twice the credits until 31 January 2027:
- A credit pack is 1,000 credits instead of 500.
- Hobby is 1,500 credits a month instead of 750.
- Workshop is 2,000 credits a month instead of 1,000.
20% off for Obico Premium subscribers
If you subscribe to Obico Premium, Hobby and Workshop cost 20% less: $8 or $16 a month, or $80 or $160 a year. Sign up for JusPrin with the same email address as your Obico account, and the lower price shows when you subscribe. You keep the discount for as long as you keep that JusPrin plan.
You can see the current prices at any time on the Credits and plans page.
Coming from JusPrin 1
- Installing. On Windows, the installer replaces JusPrin 1. On a Mac, dragging JusPrin 2 to Applications replaces JusPrin 1. On Linux, the AppImage is a new file, and JusPrin 1's AppImage stays where it is.
- Your printers. The first time JusPrin 2 starts, it offers to import your printers from JusPrin 1, with their filaments and print settings. JusPrin 2 only reads JusPrin 1's folder and never changes it.
- Your account. JusPrin 2 has its own accounts. Your JusPrin 1 sign-in doesn't carry over, so sign up again in JusPrin 2. Chats from JusPrin 1 aren't imported.
- Your JusPrin 1 subscription. If you pay for JusPrin 1, you keep your price. Sign up in JusPrin 2 with the same email address, and within a day we move you to the Hobby plan at what you pay now: $6.99 a month or $59.99 a year. If you signed up with a different address, write to jusprin-support@obico.io and tell us both.
Free and open source
JusPrin is free and open source, under the GNU Affero General Public License version 3. The source code is at github.com/TheSpaghettiDetective/JusPrin.
JusPrin is built on OrcaSlicer. We thank SoftFever and everyone who works on OrcaSlicer, and the projects it grew from. If you like JusPrin, star OrcaSlicer on GitHub too.
Give JusPrin 2 a try
Tell AI how you want a part printed, show it a photo when a print goes wrong, and use your own AI key for free.
Download JusPrin 2 from GitHub, for Windows, Mac and Linux. The release notes list everything that is new.
Questions or problems: write to jusprin-support@obico.io, or use Help › Report a problem in the app.